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Start Over Author Winchell, N. H. (Newton Horace), 1839-1914 Year 1887 Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Preliminary geological map of the iron bearing rocks of the northeastern part of Minnesota

Maps University Of Minnesota Public content
1887. Geological and Natural History Survey of Minnesota, Winchell, Alexander, 1824-1891, and Winchell, N. H. (Newton Horace), 1839-1914. Cartographic Details: Scale approximately 1:330,000 (W 92°1'--W 89°30'/N 48°14'--N 47°3'). Relief shown by hachures. Cover title: Winchell's Geolog... Geological and Natural History Survey of Minnesota ; St. Paul, Minnesota.